test normalization method

/*
  0  23  46  69  93 116 139 162 186 209 232
  0  23  46  69  93 116 139 162 186 209 232
  0  23  49 155 225 229 191 165 186 209 232
  0  23 145 232 232 232 232 201 186 209 232
  0  23 223 232 232 232 232 230 186 209 232
  0  23 223 232 232 232 232 230 186 209 232
  0  23 145 232 232 232 232 201 186 209 232
  0  23  49 155 225 229 191 165 186 209 232
  0  23  46  69  93 116 139 162 186 209 232
  0  23  46  69  93 116 139 162 186 209 232
  0  23  46  69  93 116 139 162 186 209 232
*/

public class test {
   public static void main(String [] args) {
	System.out.format("test1%n%n");
	test1();
	System.out.format("%n%n%ntest2%n%n%n");
	test2();
   }


   public static void test1() {
	int p00 = 116;
	int p01 = 139;
	int p02 = 162;
	int p10 = 229;
	int p11 = 191;
	int p12 = 165;
	int p20 = 232;
	int p21 = 232;
	int p22 = 201;
	int sumx;
	   sumx = p02-p00 +((p12-p10)<<1) + p22-p20;
	System.out.format("sumx %d%n",sumx);
	sumx = sumx>>3;
	System.out.format("scaled %d%n",sumx);
	sumx = (sumx+256)>>1;
	System.out.format("final %d%n",sumx);

	int mask[][] = { {-1, 0, 1},{-2, 0, 2},{-1, 0, 1} };

	int sum0,sum1,sum2,sum;
        sum0 = mask[0][0]*p00 + mask[0][1]*p01 + mask[0][2]*p02;
        sum1 = mask[1][0]*p10 + mask[1][1]*p11 + mask[1][2]*p12;
        sum2 = mask[2][0]*p20 + mask[2][1]*p21 + mask[2][2]*p22;
	sum = sum0 + sum1 + sum2;
	System.out.format("sum %d%n",sum);
	sum = sum/8;
	System.out.format("scaled %d%n",sum);
	sum = (sum+256)/2;
	System.out.format("final %d%n",sum);
   }

  public static void test2()
  {
     int i, sum, out1, out2;
     System.out.format("%5s%5s%5s%n","s","s>>3","s/8");
     for (i=0; i<12; i++) {
	sum = -i;
        out1 = sum>>3;
        out2 = sum/8;
        System.out.format(" %4d %4d %4d%n",sum,out1,out2);
    }
  }
}